Julia Bayer

Diagram explaining how the timing between a bullet’s supersonic shock wave (“crack”) and the muzzle blast (“pop”) can be used to estimate the distance between a shooter and a microphone. Three scenarios (T₁, T₂, T₃) show a rifle firing a supersonic bullet past a microphone. In each scenario, the ballistic shock wave cone reaches the microphone before the slower muzzle blast sound. To the right of each diagram is a waveform: a sharp spike labeled the shock-wave “crack,” followed by a later cluster of peaks labeled the muzzle-blast “pop.” The time delay between these events (t_d1, t_d2, t_d3) increases as the microphone is positioned farther downrange. A formula shows distance = t_d / (1/c − 1/v), where c is the speed of sound and v is bullet speed. Text boxes explain: “Downrange timing between shock wave ‘crack’ and muzzle blast ‘pop’ gives distance estimate between shooter and microphone,” and “For investigation of Trump assassination attempt: microphone signal was from the lectern.”

The forensic audio analysis by Rob C. Maher of the 2024 Trump assassination attempt has been peer-reviewed and published in the Journal of the Audio Engineering Society. This is great news for visual and audio investigations! aes2.org/publications...

A newspaper article featuring a large photo of an older man with short white hair holding an acoustic guitar in a living room. The headline reads “Video met oud lied Martens viraal in VS,” and the article discusses musician Sido Martens and the unexpected viral use of his decades-old song.

A 50-year-old song by Leeuwarden (my hometown!) artist Sido Martens has suddenly racked up millions of Facebook views — but he only heard via Universal and doesn’t know which vid used it. He’s asked if the OSI/@quiztime.bsky.social community can help find out: www.youtube.com/watch?v=E-yT...

Have fun @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

📸 Where was this photo taken?

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It’s been a while but here‘s another #FridayQuiz @quiztime.bsky.social Where did I go today?

✅ Solutions below the GIF👇🏻
📝 Explain your solution
🔄 Repost if you ❤️ it or for help
🥳 Have fun!

#geolocation #osint

Have fun @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

📸 Where was this photo taken?

Bonus: At what time ⏰ in September?

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Welcome to @quiztime.bsky.social unsolved #MondayQuiz.

💡 Any ideas? Any tips wanted?

You Stitch It! – Create Panoramas From Videos or Photos With You Stitch It, you can create a panoramic image from multiple images or from a video. Panoramas provide you with a good overview of a situation, single images or vertical video may not show you t...

💡 What is missing in video verification?

🧩 The answer: You Stitch It

✅ Create panoramas from videos or photos
✅ Inspect specific frames with a magnifier
✅ Download selected frames for deeper analysis

👉 Try it here: www.youstitch.it

Shine bright and all together @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

📸 Where was this photo taken?

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🤝 reply to all for collaboration
🌈have fun

Searching together @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🖼️ Can you find the exact spot?

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Diving through the clouds @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🖼️ Can you find the exact spot?

📮reply just to me with an answer
🤝 reply to all for collaboration
🌈have fun

It's overtime for another #WednesdayQuiz @quiztime.bsky.social 🎉 #OSINT -skills ready!

1️⃣ Where was I enjoying this view just 2 weeks ago?
2️⃣ Name the forrest 🌳
3️⃣ What outrage did it cause last week?

✅ Solutions below the GIF👇🏻
📝 Explain your solution
🔄 Repost if you ❤️ it or for help
🥳 Have fun!

👏🏼👏🏼👏🏼 How did you find all the info? Well done!!

There is always a way in @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🖼️ Can you find the whole picture?

📮reply just to me with an answer
🤝 reply to all for collaboration
🌈have fun

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🖼️ Can you find the whole picture?

📮reply just to me with an answer
🤝 reply to all for collaboration
🌈have fun

Almost 👌🏼 Björn had to cancel. Do you know who came instead?

Keep on growing @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🎤 Last week I saw two different singers in one evening in this venue. One of them involves a 🐈 in the name.

Can you find both singers?

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Never give up @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

📸 Can you name the city?

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It helps to exclude things @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🚂 7th of July, leaving or arriving?

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Enjoy your ride @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social

Welcome to @quiztime.bsky.social and it’s #MondayQuiz

🚐 What is the car on the left doing?
Bonus: Where was this photo taken?

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Turn on the music and feel the beat @quiztime.bsky.social with @trbrtc.bsky.social, @sector035.bsky.social, @dondude.bsky.social, @mahrko.de, @kollege.bsky.social , @fstegers.bsky.social, @tlmn.bsky.social @larswienand.bsky.social @dondude.bsky.social @mcantow.bsky.social @loegli.bsky.social